156 S. II. SCUDDER ON SPINED MYRIAPODS 



more imperfect, consisting of only a dozen segments or less of the front portion, with 

 scarcely any appendages. It is of particular interest, however, from partially preserving 

 the eye of one side (PI. 11, fig. 10) ; it forms an oval boss 3 mm. long and 1.5 mm. broad, 

 gently elevated above the principal curve of the head, situated low down on the anterior 

 portion of the head, its longer diameter vertical ; it is covered with nearly hemispherical, 

 low, circular warts about 0.16 mm. in diameter, crowded rather closely but not attingent, 

 and scattered about over the whole convexity with a slight indication of serial arrange- 

 ment. The length of the fragment is 36 mm. and its breadth about 10 mm. 



The last specimen I have to mention was sent to me by Mr. Pike and represents the 

 larger part of a young individual curled in a broad sigmoid curve. Sixteen or seventeen 

 consecutive segments besides the head are preserved, all poorly ; the spines and legs are 

 everywhere fragmentary and add nothing to the other specimens ; the diameter differs 

 only a very little at different parts, though the usual enlargement of the segments a little 

 way behind the head is indicated. The head itself appears to be larger than the segments 

 behind it, but is very badly preserved. The points of interest in it are : first, that the basal 

 joints of a leg may be seen on the first segment behind the head ; second, that the ventral 

 plates, where seen, are divided by a distinct suture into anterior and posterior portions, as 

 does not appear in the other specimens where ventral plates are preserved, but as occurs 

 in some specimens of Euphoberia ; and third, that from near the posterior extremity of the 

 sixth (?) segment behind the head, there projects downward a long, straight, stout, cylin- 

 drical, bluntly terminated rod, as long as the width of the body, the apical apparently a 

 little stouter than the basal half, suggesting, as in other cases to be mentioned, an intro- 

 mittent organ. The length of the specimen as it lies is 83 mm.; if straightened it would 

 measure about 97 mm. in length; its diameter is 11 mm.; and the length of the rod men- 

 tioned 10 mm.; the greatest diameter of the latter is 1.25 mm. 



This species differs from the next to be mentioned in the much less rapidly tapering form 

 of the body, in the proportionally shorter segments, and in the character of the spines, 

 which in this species are longer bodied, rather less divergently and much more equally 

 branched at tip, and are furnished with basal spinules of a remarkable character which are 

 not apparent in the other. 



Acantherpestes Brodiei Scudder. 

 PI. 11, fig. 5. 



"Caterpillar" Westwood in Brodie, Foss. Ins. Eng., xvii, 105, pi. 1, fig. 11 (1815). 

 Eurypterus ? {Euphoberia) ferox (pars) Woodward, Geol. Mag., X, 109-110, fig. 10 



(1873). 



Arthropleura ferox Woodward, Monogr. Merost., 172, fig. 63 (1872). 

 Euphoberia ferox Roemer, Leth. geogn., pi. 47, fig. 4 (1874). 

 Not Eurypterus ferox Salter. 



This species has been known through Brodie's Fossil Insects for many years, but it is only 

 recently that its relationship was determined. This is partly due to its fragmentary nature, 

 for it is pretty evident from what we now know of the spined myriapods of the carbonifer- 

 ous period that the specimen is considerably imperfect, the head (and perhaps two or three 



